from jay-z and britney spears to first lady michelle obama and hillary clinton. they're all apparent victims of what is known as a doxing attack. it involves gathering private documents and posting them on the internet. even the most protected people on the internet allegedly hit. vice president biden, attorney eric holder, even fbi director robert mueller. in an exclusive interview with abc's george ste, he wouldn't s whether it was authentic but confirm authorities are trying to figure out what happened. >> we should not be surprised if you have hackers who want to dig in and devote a lot of resources, that they can access people's private information. it is a big problem. >> right into the white house. >> i'm not confirming that's what happened. but you've got websites out there that sell people's credit cards that have been stolen. >> reporter: the secret service and fbi have launched full scale investigations. they're trying to determine if the information is authentic, how it was accessed and ultimately, who was responsible for posting it. sources tell abc